For what values of x and y are the triangles to the right congruent by​ HL? A triangle has a vertical side of length x, a longer horizontal side, and a third side that falls from left to right with a length of x plus 2. A right angle is indicated at the intersection of the vertical and horizontal sides. A second triangle has a vertical side of length y plus 7, a longer horizontal side, and a third side that falls from left to right with a length of 4 y. A right angle is indicated at the intersection of the vertical and horizontal sides. xx x plus 2x+2 4 y4y y plus 7